<h1>Sortable Grid</h1>
<table class="table table-striped">
    <tr>
        <td *ngFor="let col of columns"><a (click)="sort(col.name)">{{col.descr}}</a></td>
    </tr>
    <tr *ngFor="let row of rows">
        <td *ngFor="let col of columns">{{row[col.name]}}</td>
    </tr>
</table>